2
| JL Audio - RD900/5 Owner’s Manual
PROTECT YOUR HEARING!
We value you as a long-term customer. For
that reason, we urge you to practice restraint in
the operation of this product so as not to damage
your hearing and that of others in your vehicle.
Studies have shown that continuous exposure to
high sound pressure levels can lead to permanent
(irreparable) hearing loss. This and all other
high-power amplifiers are capable of producing
such high sound pressure levels when connected
to a speaker system. Please limit your continuous
exposure to high volume levels.
While driving, operate your audio system in
a manner that still allows you to hear necessary
noises to operate your vehicle safely (horns,
sirens, etc.).
SERIAL NUMBER
In the event that your amplifier requires
service or is ever stolen, you will need to have
a record of the product’s serial number. Please
take the time to enter that number in the space
provided below. The serial number can be found
on the bottom panel of the amplifier and on the
amplifier packaging.
Serial Number:
INSTALLATION APPLICATIONS
This amplifier is designed for operation in
vehicles with 12 volt, negative-ground electrical
systems. Use of this product in vehicles with
positive ground and/or voltages other than 12V
may result in damage to the product and will void
the warranty.
This product is not certified or approved for
use in aircraft.
Do not attempt to “bridge” the outputs of this
amplifier with the outputs of a second amplifier,
including an identical one.
WHAT’S INCLUDED
(1) RD900/5 amplifier
(1) Round logo badge
(1) 2.5 mm hex wrench
(1) Owner’s manual
PLANNING YOUR INSTALLATION
It is important that you take the time to
read this manual and that you plan out your
installation carefully. The following are some
considerations that you must take into account
when planning your installation.
Cooling Efficiency Considerations:
The outer shell of your JL Audio amplifier
is designed to remove heat from the amplifier
circuitry. For optimum cooling performance,
this outer shell should be exposed to the
largest possible volume of air. Enclosing the
amplifier in a small, poorly ventilated chamber
can lead to excessive heat build-up and degraded
performance. If an installation calls for an
enclosure around the amplifier, we recommend
that this enclosure be ventilated with the aid
of a fan. In normal applications, fan-cooling is
not necessary.
Left
or
Mono
Right
Only
+12 VDC
Ground
Remote
Input Mode
2 Ch. | 4 Ch. | 6 Ch.
Input Voltage
Low | High
Rem. | Offset | Signal
CH. 1
CH. 2
CH. 3
CH. 4
SUB
SUB
INPUT SEC
TION
Turn On Mode
CH. 3
(L)
CH. 4
(R)
CH. 1
(L)
CHANNELS 1 & 2
CH. 2
(R)
HP Filter Freq. (Hz)
HP Filter Freq. (Hz)
Input Type
Input Sensitivity
Input Sensitivity
Stereo | Mono
Input Type
Stereo | Mono
5 Channel System Amplifier
CHANNELS 3 & 4
Clipping
LP Filter Freq. (Hz)
Input Sensitivity
Clipping
Clipping
SUBWOOFER CHANNEL
Status
LED
(pg. 11)
Ch. 1 & 2
Clipping
Indicator
(pg. 8)
Ch. 3 & 4
Clipping
Indicator
(pg. 8)
Ch. 3 & 4 Filter
Frequency
Selector
(pg. 8-9)
Ch. 1 & 2
Input Type
(pg. 8)
Ch. 3 & 4
Input Type
(pg. 8)
Input
Mode
(pg. 7)
Input
Voltage
(pg. 7)
Turn-On
Mode
(pg. 6)
Ch. 1 & 2 Input
Sensitivity Control
(pg. 8)
Ch. 1 & 2 Filter
Frequency
Selector
(pg. 8-9)
Ch. 3 & 4 Input
Sensitivity Control
(pg. 8)
Sub Ch. Input
Sensitivity Control
(pg. 8)
Sub Ch.
Clipping
Indicator
(pg. 8)
Sub Ch. Filter
Frequency
Selector
(pg. 8-9)
INPUT SEC
TION
Left
or
Mono
Right
Only
CH. 1&2
CH. 3&4
SUB CH.
CH. 3
(L)
CH. 4
(R)
CH. 1
(L)
CH. 2
(R)
Bridged
Bridged
Speaker Outputs
Mono Subwoofer Output
Speaker Outputs
+12 VDC
Ground
Remote
Remote
Level
Control
(RBC-1)
Remote Turn-On
Connector
(pg. 6)
Chassis Ground
Connector
(pg. 5)
Channels 1 & 2
Input Jacks
(pg. 7)
Subwoofer Ch.
Input Jacks
(pg. 7)
+12 V Power
Connector
(pg. 5)
Channels 3 & 4
Speaker Outputs
(pg. 9-10)
Channels 1 & 2
Speaker Outputs
(pg. 9-10)
Channels 3 & 4
Input Jacks
(pg. 7)
Mono
Subwoofer Outputs
(pg. 10)
Remote Level
Control
(pg. 9)
